Mold for paving-bricks.



Patented Jan. l4, I902. W. H. NELSON.

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(Application filed Jan. 1'7, 1901.

2 Sheets-Sheet 2.

(No Model.)

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Armrr WILLIAM H. NELSON, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSI-GNOR OF TIVO-THIRDS TO CUTHBERT IV. RIDLEY AND FREDERICK MERTENS, OF \VASHINGTON, DISTRICT OF COLUMBIA.

MOLD FOR PAVING BRICKS.

SPECIFICATION forming part of Letters lPatent NO. 690,987, dated January 14;, 1902. Application filed January 1'7, 1901. Serial N: 43.594. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM II. NELSON, a citizen of the United States, residing at I/Vashington, District of Columbia, have invented certain new and useful Improvements in Molds for Paving-Brick; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which to it appertains to make and use the same.

This invention relates to molding apparatus, and has special reference to an improved mold of a duplex type capable of forming two diiferently-shaped bricks.

To this end the invention particularly contemplates a convertible mold capable of having molded therein either of the two preferred forms of brick disclosed in the companion application filed of even date herewith, Serial No. 43,595, and which brick are not only designed to provide a superior paving-surface adjoining the rails of a track, but which also serve the very important function of an auxiliary holding or securing means for the trackfastenings.

With the above objects in view the invention comprehends a simple and practical form of mold which can be easily handled and quickly converted from one form of brick to the other, while at the same time providing means for effecting a uniform molding of all the brick, so as to exactly or accurately fit the track-rails and track-fastenings with which the same are employed.

Other objects will appear as the nature of the invention is better understood, and while the essential features of the mold are necessarily susceptible to avarietyof modifications without departing from the spirit or scope of the invention, still the preferred embodiment is shown in the accompanying drawings, in which- Figure 1 is a perspective view of a duplex or convertible mold constructed in accordance with the present invention, the mold being the one which is shaped for the formation of bricks to fit or register with the outer side of the track-rail. Fig. 2 is a transverse sectional view of the form of mold shown in Fig. 1 with the false shaping-bottom removed, the

figure also including a view of the form of brick molded therein. Fig. 3 is a view similar to Fig. 2, showing the mold with the false bottom in position and the form of brick molded thereby. Fig. 4 isalongitudinal sectional view of the mold on the line 44: of Fig.

3. Fig. 5 is a view similar to Fig. 2, but showingthe bottom portion ofthe mold shaped to conform to the configuration of the inner side of the track-rail. Fig. 6 is a view simi- 6o lar to Fig. 3, illustrating the form of mold shown in Fig. 5 with the false bottom in position.

Like characters of reference designate corresponding parts in the several figures of the o5 drawings.

In order that the duplex nature or convertibility of the mold may be fully appreciated, reference will first be made to the type of bricks designed to be molded therein. As explained in the companion application aforesaid, the paving-bricks may be made in either of two forms, which in the present case may be designated, respectively, as form A and form B. The form A preferably consists of a rectangular body 9, provided with an approximately straight inner side 10, adapted to be moved up close against the side of the rail, and which side is preferably provided therein with a rentrant holding-pocket 11 to receive a body of cement as well as the ends of the track-fastening bolts wherever they occur. In form A of the brick the body 9 is also provided in its base with a separate holding-pocket 12, which preferably leads out to one edge of the body and is of sufficient depth and Width to take over the heads of the trackfastening bolts for the rails of a street-railway. This form of brick can be used uniformly upon both sides of the rail, both at the rail-joints and along the intermediate portions of the rail.

lVith reference to form B of the brick the same may be utilized, as explained in the companion application aforesaid, to closely reg- 5 ister with the base, Web, and tread portion of the rail between the rail-joints. In this form of brick the brick-body 9 is provided with a straight inner side portion 10*, adapted to closely fit the web of the rail, and at one uppaving and reinforcing track-rails.

per edge adjoining said inner side portion with an angular recess 10 fitting the under and edge portion of the rail-tread, thus providing a brick whose inner side corresponds exactly to the configuration of the rail against which it is placed. However, in form B of the invention it is necessary to have the bricks for the inner and outer sides of the rails somewhat differently shaped at the angular recess 10 to correspond to the different configuration of the inner and outer portions of the rail-tread. of the rail the angular recess 10 is of substantially L shape, while in the bricks for the inner side of the rail the angular recess 10 is more nearly of a U shape.

Referring now to the subject-matter of the present application the mold essentially comprises a mold-box 15, preferably of a rectangular shape and of a sufficient length and depth to mold bricks of a size suitable for In the present invention the mold-box 15 is open at the top for the introduction of the composition or brick material and for the removal of the complete brick, and in its preferable construction the said box is provided at one bottom corner with an inset angular rib 16, running longitudinally the full length of the box and corresponding to the angular recess 10 provided at one upper edge of form B of the brick. In the form of mold shown in Figs. 1 to 3, inclusive, of the drawings the angular inset rib 16 at one bottom corner of the mold-box is of substantially L shape corresponding to the outer portion of the railtread. The said mold-box 15, in addition to the angular inset rib 16, is provided with a fiat main bottom 17 and a lower inclined side portion 18, lying opposite the inclined portion 16 of the angular rib 16, the said lower inclined side portion 18 corresponding to the inclined upper side of the rail-base on which fits the lower beveled face 12 of the brick.

To provide for the formation of the separate holding-pocket 12 in the base of the brick, the mold-box 15 is provided upon one side thereof with an inwardly-projecting core-block 19, preferably of an angular formation and of a downwardly-taperingthickness,so as to reach to the fiat main bottom 17, and thus provide for forming the bottom holding-pocket 12 in the base of the brick. The said inwardlyprojecting core-block 19 also subserves another important function, and that is to assist in positioning and holding a detachable false shaping-bottom 20, adapted to removably fit within the bottom portion of the mold-box above the main bottom 17 thereof. The said detachable false shaping-bottom 20 is provided with beveled side edges 21, adapted to have a registering fit, respectively, against the inclined portion 16 of the angularportion 16 and against the opposite inclined side portion 18 of the box. The said false bottom is also provided at one edge with an angular notch 22, taking over the core-block 19, which In the bricks for the outsidetherefore serves to guide the false bottom into position and to assist in firmly holding it in place.

-To provide for the formation of the retin trant holding-pocket 11 in the side of the brick next to the rail, the detachable false bottom 20 is provided upon one side with a formingboss 22.

Referring particularly to Figs. 2 and 3 of the drawings, it will be observed that with the false bottom removed, which may be conveniently accomplished by grasping the boss 22 as a handle, form B of the brick can be made therein, as the composition or brick material will fill into the entire box, so as to conform to the shape of the entire bottom portion thereof. This form of brick is shown in Fig. 2 in connection with the mold arranged for the formation thereof, whereas to provide for forming brick A it is simply necessary to insert the false shaping-bottom 20 in position so that the brick will not partake of the angular shape of the rib 16.

The only difference in the two forms of molds shown in the drawings resides in the specific shape of the angular rib 16, so as to form bricks, respectively, for the inner and outer sides of the rails. Y

From the foregoing it is thought that the construction, operation, and many advantages of the herein-described mold will be readily apparent to those familiar with the art without further description, and it will be understood that various changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit or scope of the invention.

Having thus described the invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. A mold of the class described, comprising a mold box provided at one side with a straight plain wall and at its opposite'side with an inclined portion, said box being further provided upon the inner face of the latter side with an inwardly-projecting coreblock of downwardly-tapering thickness and extending over said inclined portion.

2. A mold of the class described comprising a mold box provided at one side with a straight plain wall and at its opposite side with an inclined portion and also upon the inner face of the latter side with an inwardlyprojecting core-block extending over said inclined portion to the bottom of the box.

3. A mold of the class described comprising a mold-box having at one side a straight plain wall provided at the bottom corner thereof with an inset angular rib, said box-having upon the inner face of its opposite side an inwardly-projecting core-block.

4. A mold of the class described comprising a mold-box having at one side a core-block extending to the bottom of the box, and a detachable false shaping bottom registering within the bottom portion of the box and interlocking with said core-block.

IIO

5. A mold of the class described comprising a box provided at one corner with an inset angular rib havinga beveled portion, a lower inclined side portion opposite the rib, and an 5 inwardlyprojecting core block extending, over said lower inclined side portion and a detachable false shaping-bottom loosely interlocked with the core-block and having beveled edges fitting the lower inclined side of 10 the boX and the inclined portion of said rib.

6. A mold of the class described comprising a mold-box having at one side a core-block, and a detachable false shaping-bottom provided at one side with a formingboss.

In testimony whereof I affix my signature in presence of two witnesses.

XVILLIAM H. NELSON. Witnesses:

HENRY E. COOPER, D. P. WOLHAUPTER. 

